<!doctype html><html><head>
<title>A canvas shadow stroke example</title>

<script src="../uuCanvas.js"></script>

<script>
function xcanvas() {
    drawShape(document.getElementById('slcanvas'));
    drawShape(document.getElementById('vmlcanvas'));
    drawShape(document.getElementById('flashcanvas'));
}
function matrix() {
    drawShape(document.getElementById('slcanvas'), 1);
    drawShape(document.getElementById('vmlcanvas'), 1);
    drawShape(document.getElementById('flashcanvas'), 1);
}

var globalAlpha = 1.0
function switchAlpha() {
    globalAlpha -= 0.2;
    drawShape(document.getElementById('slcanvas'));
    drawShape(document.getElementById('vmlcanvas'));
    drawShape(document.getElementById('flashcanvas'));
}

var shadowBlur = 2;
function switchBlur() {
    shadowBlur += 2;
    drawShape(document.getElementById('slcanvas'));
    drawShape(document.getElementById('vmlcanvas'));
    drawShape(document.getElementById('flashcanvas'));
}

function drawShape(canvas, matrix){
    if (!canvas.getContext){ return; }

    var ctx = canvas.getContext('2d');

    ctx.clear();
    if (matrix) {
        ctx.translate(-10, 5);
        ctx.scale(1.2, 0.8);
        ctx.rotate(5 * Math.PI / 180);
    }
    ctx.shadowBlur = shadowBlur + 4;
    ctx.shadowOffsetX = 5;
    ctx.shadowOffsetY = 10;
    ctx.shadowColor = "gray";
    ctx.lineWidth = 5;
    ctx.globalAlpha = globalAlpha;

    var grad1 = ctx.createLinearGradient(105,0, 200,100);
    grad1.addColorStop(0,    'yellow');
    grad1.addColorStop(0.25, 'red');
    grad1.addColorStop(0.75, 'blue');
    grad1.addColorStop(1,    'limegreen');
    ctx.xMissColor = "blue";
    ctx.strokeStyle = grad1;
    ctx.strokeRect(105,0, 100,100);

    var grad = ctx.createRadialGradient(50,50,10,50,50,50);
    grad.addColorStop(0,    'yellow');
    grad.addColorStop(0.25, 'red');
    grad.addColorStop(0.75, 'blue');
    grad.addColorStop(1,    'limegreen');
    ctx.xMissColor = "limegreen";
    ctx.beginPath();
    ctx.arc(50, 50, 50, 0, Math.PI*2, false);
    ctx.strokeStyle = grad;
    ctx.stroke();

    ctx.beginPath();
    ctx.arc(200, 50, 50, 0, Math.PI*2, false);
    ctx.strokeStyle = "gold";
    ctx.stroke();

    ctx.beginPath();
    ctx.moveTo(0, 150);
    ctx.lineTo(300, 0);
    ctx.strokeStyle = "rgba(12%,34%,56%,0.4)";
    ctx.stroke();
}
</script>
    <style type="text/css">
      body { margin: 20px; font-family: arial,verdana,helvetica; background: #fff;}
      h1 { font-size: 140%; font-weight:normal; color: #036; border-bottom: 1px solid #ccc; }
      canvas { border: 2px solid #000; float: left; margin-right: 20px; margin-bottom: 20px; }
      pre { float:left; display:block; background: rgb(238,238,238); border: 1px dashed #666; padding: 15px 20px; margin: 0 0 10px 0; }
    </style>
  </head>
  <body>
    <h1>A canvas <code>shadow stroke</code> example</h1>
    <div>
      <input type="button" value="matrix effect" onclick="matrix()" />
      <input type="button" value="alpha -0.2" onclick="switchAlpha()" />
      <input type="button" value="blur +2" onclick="switchBlur()" />
      <br />
      <canvas id="slcanvas" class="sl" width="300" height="150"></canvas>
      <canvas id="vmlcanvas" class="vml" width="300" height="150"></canvas>
      <canvas id="flashcanvas" class="flash" width="300" height="150"></canvas>
      <pre>
      &lt;canvas id="slcanvas" class="sl" width="300" height="150"&gt;&lt;/canvas&gt;
      &lt;canvas id="vmlcanvas" class="vml" width="300" height="150"&gt;&lt;/canvas&gt;
      &lt;canvas id="flashcanvas" class="flash" width="300" height="150"&gt;&lt;/canvas&gt;

function xcanvas() {
    drawShape(document.getElementById('slcanvas'));
    drawShape(document.getElementById('vmlcanvas'));
    drawShape(document.getElementById('flashcanvas'));
}
function matrix() {
    drawShape(document.getElementById('slcanvas'), 1);
    drawShape(document.getElementById('vmlcanvas'), 1);
    drawShape(document.getElementById('flashcanvas'), 1);
}
var globalAlpha = 1.0
function switchAlpha() {
    globalAlpha -= 0.2;
    drawShape(document.getElementById('slcanvas'));
    drawShape(document.getElementById('vmlcanvas'));
    drawShape(document.getElementById('flashcanvas'));
}
var shadowBlur = 3;
function switchBlur() {
    shadowBlur += 3;
    drawShape(document.getElementById('slcanvas'));
    drawShape(document.getElementById('vmlcanvas'));
    drawShape(document.getElementById('flashcanvas'));
}

function drawShape(canvas, matrix){
    if (!canvas.getContext){ return; }

    var ctx = canvas.getContext('2d');

    ctx.clear();
    if (matrix) {
        ctx.translate(-10, 5);
        ctx.scale(1.2, 0.8);
        ctx.rotate(5 * Math.PI / 180);
    }
    ctx.shadowBlur = shadowBlur;
    ctx.shadowOffsetX = 5;
    ctx.shadowOffsetY = 10;
    ctx.shadowColor = "gray";
    ctx.lineWidth = 5;
    ctx.globalAlpha = globalAlpha;

    var grad1 = ctx.createLinearGradient(105,0, 200,100);
    grad1.addColorStop(0,    'yellow');
    grad1.addColorStop(0.25, 'red');
    grad1.addColorStop(0.75, 'blue');
    grad1.addColorStop(1,    'limegreen');
    ctx.xMissColor = "blue";
    ctx.strokeStyle = grad1;
    ctx.strokeRect(105,0, 100,100);

    var grad = ctx.createRadialGradient(50,50,10,50,50,50);
    grad.addColorStop(0,    'yellow');
    grad.addColorStop(0.25, 'red');
    grad.addColorStop(0.75, 'blue');
    grad.addColorStop(1,    'limegreen');
    ctx.xMissColor = "limegreen";
    ctx.beginPath();
    ctx.arc(50, 50, 50, 0, Math.PI*2, false);
    ctx.strokeStyle = grad;
    ctx.stroke();

    ctx.beginPath();
    ctx.arc(200, 50, 50, 0, Math.PI*2, false);
    ctx.strokeStyle = "gold";
    ctx.stroke();

    ctx.beginPath();
    ctx.moveTo(0, 150);
    ctx.lineTo(300, 0);
    ctx.strokeStyle = "rgba(12%,34%,56%,0.4)";
    ctx.stroke();
}
      </pre>
    </div>
  </body>
</html>
